<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>姓名案例-插值语法实现</title>
  <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
       姓：<input type="text" v-model="firstName"> <br><br>
       名：<input type="text" v-model="lastName"> <br><br>
       全名：{{firstName.slice(0,3)}}-{{lastName}}
    </div>
    <script type='text/javascript'>
        new Vue({
            el:'#root',
            data:{
               firstName:'张',
               lastName:'三'
            },
            methods:{
               
            }
        })
    </script>
</body>
</html>